Spatial-temporal variation of NDVI and its responses to precipitation and temperature in Inner Mongolia from 2001 to 2015

doi:10.7523/j.issn.2095-6134.2019.01.008

Abstract

Abstract: Using the 2001-2015 MODIS NDVI datasets along with the meteorological data (temperature and precipitation), we analyzed the correlations of NDVI in different vegetation types (woodland, grassland, cultivated land, and other land) with meteorological factors at different temporal scales. The results indicated significant regional differences of NDVI in Inner Mongolia, and NDVI overall decreased from the east to the west. The woodland had the highest NDVI, followed by the cultivated land, grassland, and other land. During the study period, NDVI in Inner Mongolia exhibited an obvious recovering trend, and the decreasing order of the rate was:cultivated land > grassland > woodland > other land. In recent 15 years, the precipitation in Inner Mongolia showed an increasing trend, whereas the change in temperature was not obvious. At yearly scale, precipitation played a decisive role for the annual change in NDVI in Inner Mongolia, which meant the increase of precipitation promoted the growth of vegetation. At monthly scale, NDVI of vegetation was influenced by both precipitation and temperature. The responses of NDVI to precipitation and temperature in grassland and cultivated land all had some time lags, while those in woodland and other land merely showed time lags to temperature.

Key words: Inner Mongolia, NDVI, climate change, spatial-temporal change, correlation

CLC Number:

TP79

LI Shuting, ZHOU Yi, WANG Shixin, SHANG Ming, YANG Baolin. Spatial-temporal variation of NDVI and its responses to precipitation and temperature in Inner Mongolia from 2001 to 2015[J]. , 2019, 36(1): 48-55.

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